Omnibus Observatory UI fixes:

runtime/observatory/lib/src/elements/strongly_reachable_instances.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:html';
 import 'dart:async';
 import 'package:observatory/models.dart' as M;
 import 'package:observatory/src/elements/curly_block.dart';
 import 'package:observatory/src/elements/instance_ref.dart';
 import 'package:observatory/src/elements/helpers/any_ref.dart';
 import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
 import 'package:observatory/src/elements/helpers/tag.dart';
 
 class StronglyReachableInstancesElement extends HtmlElement
     implements Renderable {
   static const tag = const Tag<StronglyReachableInstancesElement>(
       'strongly-reachable-instances',
       dependencies: const [CurlyBlockElement.tag, InstanceRefElement.tag]);
 
   RenderingScheduler<StronglyReachableInstancesElement> _r;
 
   Stream<RenderedEvent<StronglyReachableInstancesElement>> get onRendered =>
       _r.onRendered;
 
   M.IsolateRef _isolate;
   M.ClassRef _cls;
   M.StronglyReachableInstancesRepository _stronglyReachableInstances;
-  M.InstanceRepository _instances;
+  M.ObjectRepository _objects;
   M.InstanceSet _result;
   bool _expanded = false;
 
   M.IsolateRef get isolate => _isolate;
   M.ClassRef get cls => _cls;
 
   factory StronglyReachableInstancesElement(
       M.IsolateRef isolate,
       M.ClassRef cls,
       M.StronglyReachableInstancesRepository stronglyReachable,
-      M.InstanceRepository instances,
+      M.ObjectRepository objects,
       {RenderingQueue queue}) {
     assert(isolate != null);
     assert(cls != null);
     assert(stronglyReachable != null);
-    assert(instances != null);
+    assert(objects != null);
     StronglyReachableInstancesElement e = document.createElement(tag.name);
     e._r = new RenderingScheduler(e, queue: queue);
     e._isolate = isolate;
     e._cls = cls;
     e._stronglyReachableInstances = stronglyReachable;
-    e._instances = instances;
+    e._objects = objects;
     return e;
   }
 
   StronglyReachableInstancesElement.created() : super.created();
 
   @override
   void attached() {
     super.attached();
     _r.enable();
   }
@@ skipping 23 matching lines @@
     _result = await _stronglyReachableInstances.get(_isolate, _cls);
     _r.dirty();
   }
 
   List<Element> _createContent() {
     if (_result == null) {
       return [new SpanElement()..text = 'Loading...'];
     }
     final content = _result.samples
         .map((sample) => new DivElement()
-          ..children = [anyRef(_isolate, sample, _instances, queue: _r.queue)])
+          ..children = [anyRef(_isolate, sample, _objects, queue: _r.queue)])
         .toList();
     content.add(new DivElement()
       ..children = ([]
         ..addAll(_createShowMoreButton())
         ..add(new SpanElement()..text = ' of total ${_result.count}')));
     return content;
   }
 
   List<Element> _createShowMoreButton() {
     final samples = _result.samples.toList();
     if (samples.length == _result.count) {
       return [];
     }
     final count = samples.length;
     final button = new ButtonElement()..text = 'show next ${count}';
     button.onClick.listen((_) async {
       button.disabled = true;
       _result = await _stronglyReachableInstances.get(_isolate, _cls,
           limit: count * 2);
       _r.dirty();
     });
     return [button];
   }
 }